Zombies, Run! is all audio. How important is SEEING the horde to actually get you running?

I built Run With Zombies because I'm honestly lazy about running and needed a real reason to get off the couch.

Audio apps like Zombies, Run! helped a bit, but I kept wondering, what if I could actually see the zombies chasing me on a map? Would that finally make me move?

So I built a visual GPS version. You open the browser, allow location, and zombies spawn around your real position. The only way to survive is to physically run.

For anyone who's tried both audio-based and visual running games, does being able to see the threat on a map make a real difference in motivation, or is audio enough to get you moving? Curious to hear your thoughts.